Berkeley DB (libdb) is a programmatic toolkit that provides embedded database support for both traditional and client/server applications. It includes b+tree, queue, extended linear hashing, fixed, and variable-length record access methods, transactions, locking, logging, shared memory caching, database recovery, and replication for highly available systems. DB supports C, C++, C#, Java, PHP, and Perl APIs. It supports key-value pair (NoSQL), SQL, and Java Object formatted data. It is available for a wide variety of Unix platforms as well as QNX, Android, Mac OS X, and several varieties of Windows.

vile is a text editor which is extremely
compatible with vi. It has extended capabilities
in many areas, including multi-file editing and
viewing, mouse support, infinite undo, additional
operators, and rectangular operations. Vile has an
optional Perl interface for UNIX and NT. It can
also be built as "xvile", which is fully X-aware,
or "winvile" for Win32, with scrollbars, menus, etc.

ZSNES is an SNES emulator for i386 machines running Linux, DOS, or Windows. It
allows you to play most SNES games on your PC. It also adds several
enhancements not present in the original SNES such as filters to improve image
quality, savestates to be able to save/restore your game at any time, and more.

WeeChat (Wee Enhanced Environment for Chat) is a fast and light IRC client for many operating systems. Everything can be done with a keyboard, and it is customizable and extensible with C plugins and scripts. It is compliant with RFCs 1459, 2810, 2811, 2812, and 2813.

The PLCIO library reads and writes data to a variety of programmable logic controllers
(PLC). Now in its 20th year, PLCIO is a stable platform allowing the programmer to address
PLC memory by their tag names for different data types, regardless of the computer
architecture, with the PLC linked either directly or remotely. PLCIO abstracts the
application and communications layers so that the programmer of the business and database
logic need not worry about the communication details. Full source code is included, as are
samples and a CGI interface for PLC access from a Web browser. It runs under Linux, HP-UX,
Solaris, and QNX, and can be used as a replacement for the aging Interchange software by
Allen-Bradley. PLCIO supports the Serial DF1 and Ethernet protocols of the Allen-Bradley
PLC-5, SLC 500, ControlLogix, CompactLogix, and MicroLogix PLCs (using the CIP protocol),
the Modicon Quantum PLC, the Wago 750-842 PLC, the Siemens Step5 PLC (using the AS511 serial
protocol or via Ethernet using the INAT Echolink), and the Siemens Step 7 200, 300, and
400-series CPUs. It also supports communicating directly with an I/O bus terminal such as
the Beckhoff BK9105 or the Phoenix Contact FL IL 24 BK ETH/IP-PAC.

yaSSL is a C++ based SSL library for embedded and RTOS environments, designed for individuals who prefer to use the C++ language. For a C-based solution, please see CyaSSL. yaSSL supports the industry standards up to TLS 1.2, and also includes an OpenSSL compatibility interface.

PECoMaTo stands for Picture-Embedded COntents MAnipulation TOol. It is basically designed to display any kind of information embedded in picture files, as well as checking, filtering, extracting, removing, adding, and fixing such information. In other words, it's a metadata processor. It supports the following file formats: JPEG/JFIF, Adobe PSD and FFO, and raw IPTC. It knows about the following metadata formats: JFIF, IPTC, Exif, Adobe, and Fotostation. More file and metadata formats might be supported later (TIFF, etc.).

The goal of the Nagios Enterprise Performance
Monitoring Plugin project is to come up with
enterprise performance monitoring plugins for
commercial enterprise applications, databases, and
application frameworks.

The CyaSSL embedded SSL library is a lightweight SSL library written in ANSI C and targeted for embedded and RTOS environments, primarily because of its small size, speed, and feature set. It is commonly used in standard operating environments and cloud services as well because of its royalty-free pricing and excellent cross platform support. CyaSSL supports industry standards up to the current TLS 1.2 and DTLS 1.2 levels, is up to 20 times smaller than OpenSSL, and offers progressive ciphers such as HC-128, RABBIT, and NTRU.